King Saud Medical City, represented by the Children’s Hospital, confirmed that the cause of health problems is usually a viral infection. Such as influenza virus or respiratory syncytial virus, multiple coronaviruses, rotavirus that causes acute gastroenteritis and other viruses that spread more widely in the winter season, especially during the school season and crowding of children in classrooms, as viruses are transmitted from one child to another through sneezing and runny nose the nose).